US2530198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Bowser Inc
•
Filing: 1944-07-31
•
Granted: 1950-11-14
•
Expires: 1964-07-31
Abstract
No abstract record available.
Inventors
- 👤 Frank B Harvuot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:54
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/232; B01D29/237; B01D29/50; B01D29/52; B01D29/54; B01D35/14; B01D35/16; B01D37/00; B01D37/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1367325A
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US1642864A
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US1743122A
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US1870885A
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US2068395A
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US2068394A
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US2065658A
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US2103572A
Cited
US2110009A
Cited
US2178930A
Cited
US2286432A
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US2389603A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |